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THE COMPASS WITHIN.

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  • المؤلفون: Castelvecchi, Davide
  • المصدر:
    Scientific American. Jan2012, Vol. 306 Issue 1, p48-53. 6p. 2 Color Photographs, 2 Diagrams.
  • معلومة اضافية
    • الموضوع:
      MAGNETORECEPTION; ANIMAL homing; ANIMAL behavior; MAGNETITE; EFFECT of magnetism on fishes; FISH sense organs; BIRD navigation; PHYSIOLOGY
    • نبذة مختصرة :
      The article discusses how organisms are able to use the Earth’s magnetic field for orientation and navigation. Researchers in biology, earth science, and physics have identified magnetic organs in animals that contain microscopic magnetic particles like magnetite. An additional hypothesis for magnetic sense comes from fishes which sense voltages with their skin and may be tracking the geomagnetic field as they swim. There is not enough evidence to demonstrate whether humans have magnetic reception. INSETS: Fish Do It, Birds Maybe;Magnetic Eyes.